Don't feel guilty about anything concerning corporations. You don't have to have absolutely any loyalty to them, they're bitches that will treat you as throwable and replaceable "resource" as soon as they can find a cheaper replacement preferably from a remote country.
In software, you will be able to find a new job easily. Perhaps not the same day, as it occured to my dad in your exact same situation 50 years ago (he just crossed the road and got a better job), but you'll be able to find a new job in less than 2 weeks. So just start looking and interviewing, and when you have a proposal, give your notice.
You can consider the fact that they didn't double your salary as promised as a "polite" way to ask you to leave them.
In software, you will be able to find a new job easily. Perhaps not the same day, as it occured to my dad in your exact same situation 50 years ago (he just crossed the road and got a better job), but you'll be able to find a new job in less than 2 weeks. So just start looking and interviewing, and when you have a proposal, give your notice.
You can consider the fact that they didn't double your salary as promised as a "polite" way to ask you to leave them.